Lee Precision APP Bulge Buster Kit for Automatic Processing Press

The Lee Precision APP Bulge Buster Kit is a dedicated reloading accessory built for the Lee Automatic Processing Press (APP). It is designed to restore free function of rimless cases that have developed low base bulges, a condition that typically occurs when a firearm chamber does not fully support the base of the cartridge during firing. When paired with the appropriate Lee Carbide Factory Crimp Die, the Bulge Buster Kit brings those cases back into spec so they feed, chamber, and fire reliably again.

The kit is machined from carbide steel for long service life under repeated case sizing loads and features the standard 7/8x14 thread pattern for drop-in compatibility with the Lee APP press. It is dimensioned at 1.65 x 2.00 x 4.75 inches and finished in the signature red/silver Lee tooling color scheme. Proudly made in the USA by Lee Precision.

The APP Bulge Buster Kit covers the most common bottleneck and straight-wall rimless pistol cartridges used by today's reloaders:

• .380 ACP
• 10mm Auto
• .40 S&W
• .41 AE
• .45 ACP
• .45 GAP
• .45 Win Mag

For reloaders running high volumes of range brass through the Lee APP, this kit is a practical, purpose-built solution for keeping rimless pistol cases feeding smoothly round after round.